- Trademark: welfare
- Origin: Zhejiang, China
Main parts: Wet alarm valve
Water motor bell
Short pipe and nipples
Wet alarm valve is one of wet check valve alarm system which limited the water following to driving the other parts and alarm, it is one way valve.
Wet alarm valve is key parts of water sprinkler system, work with pressure switch, water following indicator, water sprinkler, butterfly valve, termical water test device and water pump, it is one of the wildest system used in fire sprinkler system.
2. Operation principle
Water fulled with the water pipe net system, and ready to work in any time. The working temperature 4 degree-70 degree, it can not installed in vertically only. When fire occurred in protection area, temperature be raised caused the sprinkler bulb burst, water discharged. Meanwhile water follow indicator activated, instruct the fire zone. Wet alarm check valve opened to put out the fire. Small water following into alarm and driving water motor bell, pressure switch actuated, water pump and control centered alarm.
3. The standard
GB5135 2-2003(automatic water sprinkler system part 2 wet alarm valve retarding chamber water motor gone)
Flanger standard GB9119.8-88, PN1.6MPa connection
Working pressure. 6MPa,
FM approval and SASO tested
4. Retarding technical
1) rated working pressure: 1.2MPa
2) water tested: 2.4MPa, keep 5 min, without leakage and deformation
3) volume: 1.7L
4) coupling thread: Rc3/4"
5) retarding time: 5-90s
6) drain out time: ≤ 5min